"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KQQ8-CMK : accessed 14 May 2018), Martha A Beaman in household of James H Beaman, Ward 4, Ambridge, Ambridge Borough, Beaver, Pennsylvania, United States; citing enumeration district (ED) 4-31, sheet 12B, line 77, family 217, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3426.